projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| b168057a | 1 | /* Copyright (C) 2004-2015 Free Software Foundation, Inc. |
| f10eff58 DJ |
2 | This file is part of the GNU C Library. |
| 3 | ||
| 4 | The GNU C Library is free software; you can redistribute it and/or | |
| 5 | modify it under the terms of the GNU Lesser General Public | |
| 6 | License as published by the Free Software Foundation; either | |
| 7 | version 2.1 of the License, or (at your option) any later version. | |
| 8 | ||
| 9 | The GNU C Library is distributed in the hope that it will be useful, | |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | Lesser General Public License for more details. | |
| 13 | ||
| 22423683 | 14 | You should have received a copy of the GNU Lesser General Public |
| ab84e3ff PE |
15 | License along with the GNU C Library. If not, see |
| 16 | <http://www.gnu.org/licenses/>. */ | |
| f10eff58 DJ |
17 | |
| 18 | #ifndef _FENV_H | |
| 19 | # error "Never use <bits/fenv.h> directly; include <fenv.h> instead." | |
| 20 | #endif | |
| 21 | ||
| 22 | /* Define bits representing exceptions in the FPU status word. */ | |
| 23 | enum | |
| 24 | { | |
| fbeafede JM |
25 | FE_INVALID = |
| 26 | #define FE_INVALID 1 | |
| 27 | FE_INVALID, | |
| 28 | FE_DIVBYZERO = | |
| 29 | #define FE_DIVBYZERO 2 | |
| 30 | FE_DIVBYZERO, | |
| 31 | FE_OVERFLOW = | |
| 32 | #define FE_OVERFLOW 4 | |
| 33 | FE_OVERFLOW, | |
| 34 | FE_UNDERFLOW = | |
| 35 | #define FE_UNDERFLOW 8 | |
| 36 | FE_UNDERFLOW, | |
| 37 | FE_INEXACT = | |
| 38 | #define FE_INEXACT 16 | |
| 39 | FE_INEXACT, | |
| f10eff58 DJ |
40 | }; |
| 41 | ||
| 42 | /* Amount to shift by to convert an exception to a mask bit. */ | |
| 43 | #define FE_EXCEPT_SHIFT 8 | |
| 44 | ||
| 45 | /* All supported exceptions. */ | |
| 46 | #define FE_ALL_EXCEPT \ | |
| 47 | (FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT) | |
| 48 | ||
| 49 | /* VFP supports all of the four defined rounding modes. */ | |
| 50 | enum | |
| 51 | { | |
| fbeafede JM |
52 | FE_TONEAREST = |
| 53 | #define FE_TONEAREST 0 | |
| 54 | FE_TONEAREST, | |
| 55 | FE_UPWARD = | |
| 56 | #define FE_UPWARD 0x400000 | |
| 57 | FE_UPWARD, | |
| 58 | FE_DOWNWARD = | |
| 59 | #define FE_DOWNWARD 0x800000 | |
| 60 | FE_DOWNWARD, | |
| 61 | FE_TOWARDZERO = | |
| 62 | #define FE_TOWARDZERO 0xc00000 | |
| 63 | FE_TOWARDZERO | |
| f10eff58 DJ |
64 | }; |
| 65 | ||
| 66 | /* Type representing exception flags. */ | |
| 67 | typedef unsigned int fexcept_t; | |
| 68 | ||
| 69 | /* Type representing floating-point environment. */ | |
| 70 | typedef struct | |
| 71 | { | |
| 72 | unsigned int __cw; | |
| 73 | } | |
| 74 | fenv_t; | |
| 75 | ||
| 76 | /* If the default argument is used we use this value. */ | |
| acfa885f | 77 | #define FE_DFL_ENV ((const fenv_t *) -1l) |
| f10eff58 DJ |
78 | |
| 79 | #ifdef __USE_GNU | |
| 80 | /* Floating-point environment where none of the exceptions are masked. */ | |
| 57920720 | 81 | # define FE_NOMASK_ENV ((const fenv_t *) -2) |
| f10eff58 | 82 | #endif |